Tire Pressure Warning System - Diagnostics: Overview Toyota Matrix E130

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1. TIRE PRESSURE WARNING SYSTEM PRECAUTION When the tire pressure warning lamp comes on, immediately check the air pressure of all tires and adjust to the specified pressure. TIRE PRESSURE WARNING SYSTEM SPECIFICATION Tire Size Specified Value (Front) Specified Value (Rear) P205/55 R16 89H P215/50 ZR17 P215/50 R17 90H 220 kPa (2.2 kgf/cm 2 , 31 psi) 220 kPa (2.2 kgf/cm 2 , 31 psi) P205/55 R16 89H (4WD) 240 kPa (2.4 kgf/cm 2 , 34 psi) 220 kPa (2.2 kgf/cm 2 , 31 psi) This system requires initialization after changing tires or wheels, or after rotating the tires (see «INITIALIZATION»(ref-225876-S41200266862006032300000) ). Set tire pressure within the specified range before initialization. If the tire pressure is not within the specified range, the tire pressure warning system will not function. In the following cases, the system may not operate normally. A compact spare tire, snow tires, or tire chains are used. The tire pressure is excessively higher than specified, or tire pressure suddenly drops due to bursting or other causes. The vehicle is driven on a slippery road surface such as rough or frozen roads. The vehicle speed is less than 19 mph (30 km/h) or more than 62 mph (100 km/h), and the driving duration is less than 5 minutes. The tires differ in tread pattern or by manufacturer. The tires are not the specified size. The tread wear is very different among the installed tires. During rapid acceleration/deceleration or sharp turns. Towing a trailer. The loading is over the limit or imbalance. Initialization was not performed correctly after replacing or rotating tires or wheels. The outside temperature is below 32°F (0°C) or above 104°F (40°C).
2. FAIL-SAFE FUNCTION When a system malfunction occurs in the tire pressure warning system, the tire pressure warning lamp blinks. The result of this diagnosis is stored in the skid control ECU.

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1. TIRE PRESSURE WARNING SYSTEM DESCRIPTION The tire pressure warning system informs the driver if it detects a low tire pressure. When the tire pressure warning system detects low tire pressure in any of the 4 wheels, which affects safe driving and the tire pressure warning lamp comes on. TIRE PRESSURE WARNING SYSTEM DESCRIPTION Tire Size Specified Value (Front) Specified Value (Rear) FF P205/55 R16 89H P215/50 ZR17 P215/50 R17 90H 220 kpa (2.2 kgf/cm 2 , 31 psi) 220 kpa (2.2 kgf/cm 2 , 31 psi) 4WD P205/55 R16 89H 240 kpa (2.4 kgf/cm 2 , 34 psi) 220 kpa (2.2 kgf/cm 2 , 31 psi) Tire pressure warning system is controlled by the skid control ECU. HINT: When the tire pressure warning reset switch is pushed, the tire pressure warning lamp goes off.
2. TIRE PRESSURE WARNING DISPLAY FUNCTION The tire pressure warning lamp comes on, according to the condition of the tire pressure warning system, as shown in the DIAGNOSIS SYSTEM (see «DIAGNOSIS SYSTEM»(ref-225876-S05183441232006032300000) ).